Finding the Fourth Proportional to 2,126.72, 2,934.42 and 1,287.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,126.72 : 2,934.42 = 1,287.26 : x
2. Step 2: Convert to fraction form
   2,126.72/2,934.42 = 1,287.26/x
3. Step 3: Cross multiply
   2,126.72x = 2,934.42 × 1,287.26
4. Step 4: Simplify right side
   2,126.72x = 3,777,354.15
5. Step 5: Solve for x
   x = 3,777,354.15/2,126.72
6. Step 6: Final answer
   x = 1,776.14